Hydrostatic Testing & Cylinder Recertification Services
Pressurized cylinders that fail under pressure can cause serious injury, equipment damage, downtime, and compliance issues. Hydrostatic testing helps identify leaks, corrosion, expansion, and structural weaknesses before a cylinder becomes unsafe to use.
Utah-Only Specialized Cylinder Testing
State Fire provides hydrostatic testing and cylinder recertification services for a wide range of pressurized cylinders. SCBA cylinder testing, CNG cylinder testing, oxygen and nitrogen cylinder testing, and specialty pressurized equipment testing are provided exclusively through State Fire's Utah operations.
Availability for fire extinguisher and fire protection cylinder testing may vary by State Fire location. Contact your nearest State Fire office to confirm available services and testing requirements.
Our certified testing facilities and trained technicians help ensure each cylinder is inspected, tested, documented, and returned to service as safely and efficiently as possible.
DOT-Compliant Hydrostatic Testing & Cylinder Requalification
Hydrostatic testing is a controlled pressure test used to confirm that a cylinder can safely hold pressure during normal use. The cylinder is filled with water, pressurized to the required test pressure, and evaluated for leaks, pressure loss, and permanent expansion.
State Fire provides cylinder requalification services in accordance with applicable DOT requirements, NFPA standards, manufacturer guidelines, and cylinder condition. Our team can help determine whether your cylinder is due for testing, eligible for refill, or should be removed from service.
Hydrostatic testing is commonly required for:
- Portable and wheeled fire extinguishers
- SCBA cylinders
- Clean agent suppression cylinders
- Kitchen fire suppression cylinders
- Vehicle and mobile equipment suppression cylinders
- CNG cylinders
- Oxygen, nitrogen, and industrial gas cylinders
- Specialty pressure cylinders and applicable pressure vessels
Why Cylinder Hydrostatic Testing Matters
Most pressurized cylinders must be inspected and hydrostatically tested at regular intervals. Depending on the cylinder type, material, pressure rating, specification, and applicable regulations, testing may be required at intervals such as 3, 5, 10, or 12 years.
Routine cylinder recertification helps:
- Prevent dangerous ruptures and pressure failures
- Maintain compliance with applicable DOT, NFPA, OSHA, and local requirements
- Keep fire protection equipment ready for emergencies
- Extend usable cylinder life when equipment passes testing
- Reduce liability and safety risks
- Support audit, insurance, and AHJ documentation requirements
- Identify cylinders that should be repaired, replaced, or condemned
Skipping required hydrostatic testing can leave your facility out of compliance and may prevent cylinders from being legally refilled or returned to service.
Is Your Cylinder Due for Hydrostatic Testing?
Testing intervals vary by cylinder type and cylinder markings. If you are unsure whether your equipment is due, State Fire can inspect the cylinder, review the stamped test date, and help confirm the applicable requalification requirements.
| Cylinder Type | Typical Requalification Interval | Notes |
|---|---|---|
| Stored-pressure fire extinguishers | Often 12 years | Depends on extinguisher type, condition, and cylinder marking |
| CO2 fire extinguishers and cylinders | Often 5 years | DOT cylinder specifications may apply |
| SCBA cylinders | Often 3 or 5 years | Depends on material, DOT spec, and service-life requirements |
| Clean agent suppression cylinders | Varies | Based on system type, cylinder, agent, and applicable standards |
| Kitchen suppression cylinders | Varies | Depends on cylinder type and manufacturer requirements |
| CNG cylinders | Varies | Evaluated based on cylinder marking, use, and applicable regulations |
| Oxygen, nitrogen, and industrial cylinders | Varies | Depends on cylinder specification, service, and pressure rating |
Common signs your cylinder may need hydrostatic testing or replacement include:
- Expired or unreadable test date
- Visible dents, gouges, corrosion, or pitting
- Damaged threads, valves, hoses, or fittings
- Evidence of heat, fire exposure, or physical distortion
- Failed visual inspection
- Cylinder cannot be legally refilled without requalification
When in doubt, contact State Fire before refilling or returning a cylinder to service.
Our Cylinder Recertification Process
State Fire follows a controlled hydrostatic testing and cylinder recertification process designed to identify defects before pressurization and verify cylinder integrity before the equipment is returned to service.
Step 1: Pickup & Transport
State Fire offers pickup and transportation options to move cylinders safely from your facility to a certified testing location. This helps reduce disruption for businesses, fire departments, industrial sites, fleet operators, and multi-location facilities.
Step 2: External Visual Inspection
Before pressure testing begins, technicians inspect the outside of the cylinder for visible damage that could make it unsafe.
We inspect for:
- Deep dents, gouges, and impact damage
- External corrosion and pitting
- Weld defects or seam damage
- Cracking, bulging, or distortion
- Heat or fire damage indicators
- Damaged collars, threads, valves, or fittings
Cylinders that fail visual inspection are removed from service to help prevent hazardous failure.
Step 3: Internal Cylinder Inspection
When required, fittings and valves are removed so technicians can inspect the cylinder interior.
This may include:
- Removing discharge hoses, valves, and siphon tubes
- Fully discharging remaining contents
- Inspecting the interior for corrosion, scale, or pitting
- Checking threads and sealing surfaces
- Confirming the cylinder is suitable for pressure testing
Internal integrity is critical before a cylinder is pressurized.
Step 4: Hydrostatic Pressure Testing
Cylinders that pass inspection are filled with water and pressure tested using the required test pressure for that cylinder type.
During hydrostatic testing, technicians:
- Fill and seal the cylinder with water
- Apply the required test pressure
- Monitor for leaks or pressure loss
- Measure cylinder expansion
- Calculate permanent expansion against allowable limits
- Remove failed cylinders from service
Using water helps reduce stored energy during the test and makes the process safer than pressurizing with compressed gas.
Step 5: Cylinder Reconditioning & Refill
Cylinders that pass testing are restored to service-ready condition when applicable.
This may include:
- Draining, drying, and interior cleaning
- Replacing worn fittings, O-rings, valves, or hoses
- Refilling agent or contents to specification
- Repressurizing the cylinder
- Installing tamper seals or service tags
- Applying compliance labels for low-pressure cylinders
- Stamping high-pressure cylinders with the test date and facility identification
Step 6: Documentation, Delivery & Return to Service
After testing and reconditioning are complete, State Fire provides documentation for your records and coordinates return delivery or installation support when applicable.
Documentation may support:
- DOT compliance
- NFPA inspection records
- Fire marshal or AHJ review
- Insurance documentation
- Internal safety audits
- Multi-site equipment tracking
Our goal is to minimize downtime while keeping your cylinders compliant, documented, and ready for use.
Equipment We Hydrostatically Test
State Fire provides hydrostatic testing and cylinder recertification for fire protection cylinders and other applicable pressurized equipment. Service availability varies by cylinder type and State Fire location.
Fire Protection Cylinders
- Portable fire extinguishers
- Wheeled fire extinguishers
- Clean agent suppression cylinders
- Kitchen suppression cylinders
- Vehicle and mobile equipment fire suppression cylinders
- Special hazards suppression cylinders
Specialty & Industrial Cylinders
The following specialized hydrostatic testing and cylinder recertification services are available exclusively through State Fire's Utah operations:
- SCBA cylinder hydrostatic testing
- CNG cylinder hydrostatic testing
- Oxygen cylinder testing
- Nitrogen cylinder testing
- Specialty pressurized equipment testing
Additional specialty and industrial cylinder services may be available depending on the cylinder type, equipment, testing requirements, and State Fire location, including:
- Industrial gas cylinder testing
- Specialty pressure cylinder testing
- Applicable industrial pressure vessels
If you need specialized cylinder testing, contact State Fire to confirm your cylinder type, applicable testing requirements, and service availability.
Industries We Serve
State Fire provides hydrostatic testing and cylinder recertification for organizations that rely on pressurized cylinders, fire protection equipment, and documented safety programs.
We serve:
- Commercial buildings and office properties
- Industrial manufacturing facilities
- Construction companies
- Agriculture operations
- Oil and gas facilities
- Mining operations
- Government and municipal buildings
- Hospitals and healthcare facilities
- Fire departments and emergency services
- Schools, universities, and religious institutions
- Restaurants and commercial kitchens
- Transportation and fleet operators
- Multi-site property and facility management teams
Why Choose State Fire for Cylinder Recertification
When cylinder safety and compliance matter, you need a qualified fire protection partner that understands inspection requirements, documentation, equipment downtime, and facility operations.
State Fire offers:
- Hydrostatic testing and cylinder requalification services
- Fire extinguisher hydrostatic testing
- Testing for applicable low-pressure and high-pressure cylinders
- Pickup and delivery service options
- Cylinder inspection and reconditioning
- Testing documentation and compliance records
- Support for commercial, industrial, municipal, and government clients
- Multi-site coordination for fleet and portfolio operators
- Specialized SCBA, CNG, oxygen, nitrogen, and specialty pressurized equipment testing through our Utah operations
Hydrostatic Testing Services Near You
State Fire provides hydrostatic testing and cylinder recertification through qualified testing facilities and regional operations. Service availability varies by location and cylinder type.
Fire extinguisher and fire protection cylinder testing is available through applicable State Fire locations. SCBA cylinders, CNG cylinders, oxygen and nitrogen cylinders, and specialty pressurized equipment are tested and recertified exclusively through our Utah operations.
Whether you need fire extinguisher hydrostatic testing, fire suppression cylinder testing, or specialized cylinder recertification, contact your nearest State Fire location to confirm service availability.
Hydrostatic Testing FAQs
What is hydrostatic testing?
Hydrostatic testing is a pressure verification test that fills a cylinder with water and applies pressure above normal operating levels to confirm the cylinder can safely hold pressure without leaking, expanding excessively, or failing structurally.
How often do cylinders need hydrostatic testing?
Hydrostatic testing intervals vary by cylinder type, material, specification, service, and applicable regulations. Depending on the cylinder, testing may be required at intervals such as 3, 5, 10, or 12 years.
How do I know if my cylinder is due?
Check the cylinder stamp, service label, manufacturer date, or most recent hydrostatic test date. If the markings are unreadable or you are unsure which interval applies, State Fire can inspect the cylinder and help confirm whether testing or replacement is required.
What happens if a cylinder fails hydrostatic testing?
A failed cylinder is removed from service and may be condemned if it cannot safely hold pressure or meet allowable expansion limits. State Fire can help document the failure, recommend replacement options, and support proper disposal when required.
Can all fire extinguishers be hydrostatically tested?
Most rechargeable commercial fire extinguishers can be tested, but extinguishers with severe damage, expired markings, non-rechargeable designs, or unsafe cylinder conditions may need to be replaced instead of tested.
Is hydrostatic testing required by law?
Many pressurized cylinders are subject to DOT requalification requirements, and fire extinguishers are also covered by applicable NFPA inspection, maintenance, and testing standards. Requirements vary by cylinder type, use, specification, and marking.
Do you provide pickup and delivery?
Yes. State Fire offers pickup and delivery options for businesses and facilities to help transport cylinders safely to and from applicable testing locations while reducing operational disruption.
Is SCBA hydrostatic testing available nationwide?
No. State Fire's SCBA cylinder hydrostatic testing and recertification services are provided exclusively through our Utah operations. Contact State Fire to confirm availability and requirements for your SCBA cylinders.
Is CNG cylinder hydrostatic testing available at all State Fire locations?
No. State Fire provides CNG cylinder hydrostatic testing and recertification exclusively through our Utah operations. Contact us to confirm whether your CNG cylinder is eligible for testing.
Schedule Hydrostatic Testing & Cylinder Recertification
Not sure whether your cylinder needs hydrostatic testing, recertification, refill, or replacement? State Fire can help.
Contact our team today to schedule cylinder pickup, request hydrostatic testing, or speak with a technician about your compliance requirements.